the field of medicine that specializes in the study of tumors. oncology. The branch of medicine that deals with the study and treatment of tumors.
Who are they? Millennials are currently aged 20-35, or born between 1980 and the end of 1994 (with some more generous definitions taking in those born up to 2000). They also get called Generation Y, because they follow on from Generation X (born 1965-1979), and other, less flattering names.
Resolution Foundation described Millennials as those born between 1980 and 2000 (aged between 15 and 35) at the time of the research for a 2016 study comparing the earnings of Millennials to Generation X. Pew Research Center defines Millennials as being born from 1981 onwards.